these 2 derivations will be built:
  /nix/store/vsc50yw2jjmjiyhhk33jja3c30g7a2fv-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/2zlkzdhaaaafi6dl7d1v2g455y65jmv9-nix-grpc-store-dispatcher.drv